10400434040 has 16 divisors (see below), whose sum is σ = 23400976680. Its totient is φ = 4160173600.

The previous prime is 10400434021. The next prime is 10400434061. The reversal of 10400434040 is 4043400401.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 130005386 + ... + 130005465.

Almost surely, 2^10400434040 is an apocalyptic number.

10400434040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10400434040 is an abundant number, since it is smaller than the sum of its proper divisors (13000542640).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10400434040 is a wasteful number, since it uses less digits than its factorization.

10400434040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260010862 (or 260010858 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 10400434040 its reverse (4043400401), we get a palindrome (14443834441).

The spelling of 10400434040 in words is "ten billion, four hundred million, four hundred thirty-four thousand, forty".